Isn't Catalina water and Scripps one and the same? At least back in the day, I thought Catalina is the trade name for a company that re-sells water collected from the Scripps pipe.
I just picked up a small AIO from Petco and am playing with the idea of getting back in to reefing. I got out back in 2010. Do reefers still use Catalina water? Pasadena Tropical Fish (PTF) is close to me. And using Catalina water would be easier than mixing.